Fail-Safe Chart
WARNING: This page is about a different car, the 2008 Toyota Yaris. However, it is still accessible from the selected car via links, so may be relevant.
- FAIL-SAFE FUNCTION
- When communication fails in any of the CAN bus lines (communication lines) due to a short circuit or other causes, the fail-safe function, which is specified for each system, operates to prevent the system from malfunctioning.
- Relationships between components and system functions and effects of communication failure on these functions. (For further details, see the pages for each system.)FAIL-SAFE FUNCTION CHART
Function ECM Brake Actuator (Skid Control ECU) Power Steering ECU Center Airbag Sensor Assembly Air conditioning Amplifier Combination Meter ECU Main Body ECU Condition when communication impossible DTC detection (Driver detectable) ABS control (Controls driving force while ABS in operation) ◦*1 • Control inoperative (Gradually stops controlling during ABS control) Detectable (Light comes on) Electric power steering (Outputs assist current) ◦ ◦ • Steering force slightly increased at less than 43.5 mph (70 km/h) Steering force slightly reduced at 43.5 mph (70 km/h) or more Detectable (Light comes on) Event recorder (Tracks event data such as vehicle speed and accelerator opening angle and records data) ◦ • ◦ Data not recorded None Air conditioning control PTC heater control ◦ • ◦*2 Air conditioning function stops PCT heater function stops None (Air conditioning inoperative) Meter Display (Displays operation condition and DTCs) ◦ ◦ ◦ ◦ • ◦ Light dose not come on, illuminates abnormally, or blinks abnormally Detectable (Abnormal display) Buzzer control ◦ • ◦ Buzzer function stops None (Buzzer does not sound) Illumination control ◦ • Light illumination rheostat inoperative None (Rheostat inoperative) Power door lock control ◦ ◦ ◦ • Unlock permitted None (Wireless door lock operation) HINT:
- •: Control master
- ◦: System related
- *1: Hatchback
- *2: Sedan